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Title: Coaxial Ag/ZnO/Ag nanowire for highly sensitive hot-electron photodetection

Abstract

Single-nanowire photodetectors (SNPDs) are mostly propelled by p-n junctions, where the detection wavelength is constrained by the band-gap width. Here, we present a simple doping-free metal/semiconductor/metal SNPD, which shows strong detection tunability without such a material constraint. The proposed hot-electron SNPD exhibits superior optical and electrical advantages, i.e., optically the coaxial design leads to a strong asymmetrical photoabsorption and results in a high unidirectional photocurrent, as desired by the hot-electron collection; electrically the hot-electrons are generated in the region very close to the barrier, facilitating the electrical transport. Rigorous calculations predict an unbiased photoresponsivity of ∼200 nA/mW.

Authors:
; ; ; ;  [1];  [2]
  1. College of Physics, Optoelectronics and Energy and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22412679
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DIFFUSION BARRIERS; ELECTRIC CONDUCTIVITY; ELECTRON DETECTION; ELECTRONS; ENERGY GAP; HETEROJUNCTIONS; NANOWIRES; PHOTODETECTORS; P-N JUNCTIONS; SEMICONDUCTOR MATERIALS; SILVER; WAVELENGTHS; ZINC OXIDES

Citation Formats

Zhan, Yaohui, Li, Xiaofeng, E-mail: xfli@suda.edu.cn, Wu, Kai, Wu, Shaolong, Deng, Jiajia, and Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province and Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006. Coaxial Ag/ZnO/Ag nanowire for highly sensitive hot-electron photodetection. United States: N. p., 2015. Web. doi:10.1063/1.4913613.
Zhan, Yaohui, Li, Xiaofeng, E-mail: xfli@suda.edu.cn, Wu, Kai, Wu, Shaolong, Deng, Jiajia, & Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province and Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006. Coaxial Ag/ZnO/Ag nanowire for highly sensitive hot-electron photodetection. United States. doi:10.1063/1.4913613.
Zhan, Yaohui, Li, Xiaofeng, E-mail: xfli@suda.edu.cn, Wu, Kai, Wu, Shaolong, Deng, Jiajia, and Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province and Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006. Mon . "Coaxial Ag/ZnO/Ag nanowire for highly sensitive hot-electron photodetection". United States. doi:10.1063/1.4913613.
@article{osti_22412679,
title = {Coaxial Ag/ZnO/Ag nanowire for highly sensitive hot-electron photodetection},
author = {Zhan, Yaohui and Li, Xiaofeng, E-mail: xfli@suda.edu.cn and Wu, Kai and Wu, Shaolong and Deng, Jiajia and Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province and Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006},
abstractNote = {Single-nanowire photodetectors (SNPDs) are mostly propelled by p-n junctions, where the detection wavelength is constrained by the band-gap width. Here, we present a simple doping-free metal/semiconductor/metal SNPD, which shows strong detection tunability without such a material constraint. The proposed hot-electron SNPD exhibits superior optical and electrical advantages, i.e., optically the coaxial design leads to a strong asymmetrical photoabsorption and results in a high unidirectional photocurrent, as desired by the hot-electron collection; electrically the hot-electrons are generated in the region very close to the barrier, facilitating the electrical transport. Rigorous calculations predict an unbiased photoresponsivity of ∼200 nA/mW.},
doi = {10.1063/1.4913613},
journal = {Applied Physics Letters},
number = 8,
volume = 106,
place = {United States},
year = {Mon Feb 23 00:00:00 EST 2015},
month = {Mon Feb 23 00:00:00 EST 2015}
}